enumerate() is not really needed

Signed-off-by: NLuca Falavigna <dktrkranz@debian.org>

dak/process_new.py

@@ -526,7 +526,7 @@ def do_new(upload, upload_copy, handler, session):
         if missing:
             print "NEW\n"
 
-        for i, package in enumerate(missing):
+        for package in missing:
             if package["type"] == "deb" and package["priority"] == "extra":
                 package["priority"] = "optional"